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Influence of molybdenum substitution on the microwave dielectric properties of CaWO4 ceramic

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Abstract

Dielectric properties of Ca(W1−xMox)4 (x = 0, 0.02, 0.04, 0.06, 0.08) were investigated at microwave frequency. With the increase of MoO3, the dielectric constant (ε r ) increased slightly, the value of quality factor (Q × f 0) increased considerably and reach the maximum of 79,919 GHz, and the temperature coefficient of resonant frequency (τ f) shifted for the minus direction. The relationship between the dielectric properties and polarizability, packing fraction and the oxygen bond valence were discussed. The optimum results were obtained when x = 0.06, the dielectric properties are as follows: ε r  = 10.22, Q × f 0 = 79,919 GHz and τ f = −40.39 ppm/°C.

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Acknowledgements

The authors gratefully acknowledged supports from the Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education (Tianjin University).

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Authors and Affiliations

  1. School of Electrical and Information Engineering and Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin, 300072, People’s Republic of China

    Mi Xiao, Ziqi Zhou, Qingqing Gu, Yonggui Zhao, Kuibo Lan & Ping Zhang

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  1. Mi Xiao
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  2. Ziqi Zhou
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  3. Qingqing Gu
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  4. Yonggui Zhao
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  5. Kuibo Lan
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  6. Ping Zhang
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Correspondence to Mi Xiao or Ping Zhang.

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Xiao, M., Zhou, Z., Gu, Q. et al. Influence of molybdenum substitution on the microwave dielectric properties of CaWO4 ceramic. J Mater Sci: Mater Electron 28, 10343–10348 (2017). https://doi.org/10.1007/s10854-017-6803-z

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  • DOI: https://doi.org/10.1007/s10854-017-6803-z

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